CN108110432B - Reflector antenna panel blocking method and reflector antenna - Google Patents
Reflector antenna panel blocking method and reflector antenna Download PDFInfo
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- CN108110432B CN108110432B CN201711361557.8A CN201711361557A CN108110432B CN 108110432 B CN108110432 B CN 108110432B CN 201711361557 A CN201711361557 A CN 201711361557A CN 108110432 B CN108110432 B CN 108110432B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
- H01Q15/16—Reflecting surfaces; Equivalent structures curved in two dimensions, e.g. paraboloidal
Abstract
The invention discloses a reflector antenna panel blocking method and a reflector antenna, and relates to the technical field of antennas. The edge shape of the expanded reflecting surface is hexagonal on the projection surface of the expanded reflecting surface by expanding the working curved surface of the reflecting surface; dividing the hexagon on the projection surface into uniform triangles; projecting the triangles onto a reflecting surface; and finally, determining gaps among the panels, and partitioning the curved surface of the reflecting surface to obtain the reflecting surface antenna consisting of the triangular panels. The method can make the area of the panel forming the reflecting surface uniform, simplify the structure of the antenna back frame, remarkably improve the installation precision and the adjustment efficiency of the antenna, and is particularly suitable for the design and the manufacture of the panel in a bias reflecting surface or circular symmetry reflecting surface structure.
Description
Technical Field
The present invention relates to the field of antenna technology, and more particularly, to a reflector antenna panel blocking method and a reflector antenna.
Background
The panel partitioning method of the reflector antenna is a key technology in structural design and manufacture of the antenna, and generally consists of a plurality of panels. The quality of the panel-partitioning method will directly affect the surface accuracy and mounting adjustment efficiency of the antenna and the manufacturing cost.
At present, the most commonly used panel partitioning methods for reflector antennas include the following:
(1) the method of sectoring and partitioning a quadrilateral along the circumferential direction of a reflector antenna is reported in the 'analysis and synthesis of random and systematic errors of microwave antennas facing electromechanical coupling' (Wang Meng) literature of doctor academic paper 2015 of Western electronic science and technology university.
(2) The method for vertically partitioning the reflecting surface antenna into blocks is reported in the 2015 university of western electronic technology, university of Master academic thesis, "research and design of vehicle-mounted 4.5-meter automatic folding antenna structure system" (ma Wan Shu).
(3) The rectangular blocking method of the offset reflecting surface panel is reported in the literature of '6 th edition of Beijing university of post and telecommunications' (Wangjun writings) of large-caliber compact range 'analysis of influence of inter-panel gaps on characteristics of quiet zones'.
The panel partitioning method of the reflector antenna adopts a quadrilateral form, and the method has the following defects:
(1) the traditional quadrangular panel partitioning method causes the area of each unit panel to be uneven, particularly for a large-sized reflector antenna, the area difference of each ring panel is very large, so that the accuracy discreteness of the manufactured panel is very large, and the performance of the reflector of the whole antenna is influenced. Further, the uneven area of the reflective surface panel complicates the structural design, and increases the manufacturing cost.
(2) The panel is supported into four corner points by adopting a quadrilateral blocking method, and because the supporting mode has redundant constraint, the deformation of the panel is reduced by repeatedly adjusting the heights of the supporting points in the antenna installation process. Therefore, not only are human resources wasted, but also the construction period is prolonged.
(3) The traditional blocking method influences the structural layout of the antenna back frame, the blocking method leads the antenna back frame to adopt a radial truss structure, and the truss span close to the edge of the antenna aperture is very large, so that the rigidity of the whole antenna is reduced, and the comprehensive performance index of an antenna system is influenced.
(4) For the offset reflector antenna, the geometric caliber is in a non-circular symmetrical form, if a traditional quadrilateral blocking method is adopted, the length of the side of the caliber edge panel in the radial direction is unequal, so that the gravity deformation of the panel is uneven, and the accuracy of the panel is reduced. In particular, when the antenna is moved in a pitching motion, the uneven deformation is more serious, and the dynamic performance index of the antenna system is deteriorated.
In summary, a reasonable blocking method is needed to solve the problem of blocking the conventional reflector antenna panel.
Disclosure of the invention
The invention aims to overcome the defects of the prior art and provides a reflector antenna panel partitioning method and a reflector antenna, which have the characteristics of uniform area and high structural consistency of a single panel forming the reflector of the antenna, are favorable for offsetting the structural layout of the reflector antenna aperture edge panel and can simplify the structural design of the antenna panel and an antenna back frame.
The invention is realized by the following technical scheme:
a method for partitioning a reflector antenna panel, which is used for triangular partitioning of an offset reflector or a circularly symmetric reflector, comprises the following steps:
(1) selecting three points on the edge of the antenna reflecting surface, which are not on the same straight line, and determining a plane passing through the three points, wherein the intersection line of the antenna reflecting surface and the plane is a closed curve;
(2) making a circumscribed hexagon of the closed curve on the plane;
(3) extending the reflecting surface at the edge along the tangential direction to obtain an extended curved surface of the reflecting surface;
(4) projecting the circumscribed hexagon to the extension curved surface along the normal direction of the plane to obtain a intercepted curved surface including an antenna reflecting surface, which is intercepted on the extension curved surface by six curve segments connected end to end;
(5) dividing the circumscribed hexagon, wherein the divided circumscribed hexagon is formed by splicing a plurality of triangular subregions;
(6) projecting each triangular subarea to the intercepting curved surface along the normal direction of the plane to obtain the division of the intercepting curved surface;
(7) for each divided sub-region of the intercepted curved surface, moving the boundary of the sub-region inwards to form a gap between two adjacent sub-regions, thereby completing secondary division of the intercepted curved surface;
(8) and partitioning the antenna panel according to the partitioning mode of secondary partitioning.
Optionally, the area of the triangular sub-region in the step (5) is 0.5-6 m2。
Optionally, the area ratio of the largest triangular sub-region to the smallest triangular sub-region in step (5) is not more than 1.5.
Optionally, the distance of the inward movement of the boundary in the step (7) is 0.2-5 mm.
In addition, the invention also provides a reflector antenna, which comprises a panel, wherein the panel is a triangular block panel obtained by adopting the reflector antenna panel block method, and each triangular block of the panel adopts a three-point support mode.
Compared with the prior art, the invention has the following beneficial effects:
(1) the triangular panel partitioning method of the reflector antenna overcomes the defects of the existing quadrilateral partitioning method of the reflector antenna, so that the area of the molded antenna unit panel is more uniform, and the production and the surface precision are favorably controlled.
(2) Compared with the prior art, the triangular panel adopts a three-point supporting mode, so that redundant constraint is eliminated, the panel deformation generated in the antenna installation process is avoided, and the antenna installation precision and the antenna installation efficiency are improved.
(3) According to the invention, the shape of the panel at the edge of the reflector antenna is basically consistent with the geometric shapes of other panels by the method for expanding the reflector, so that the manufacturing difficulty is reduced, and the production efficiency is improved.
(4) The triangular panel partitioning method of the reflector antenna is particularly suitable for the structural design of the offset reflector antenna, can simplify the design of the antenna back frame, and effectively reduces the overall weight of the antenna system.
In a word, the invention has the advantages of ingenious conception, clear thought and easy realization, not only solves the problem of panel blocking of the reflector antenna, but also improves the surface precision of the antenna, and is an important improvement to the prior art.
Drawings
FIG. 1 is a schematic diagram of steps 1 to 3 in an embodiment of the present invention;
FIG. 2 is a schematic diagram of steps 4 to 6 in an embodiment of the present invention;
FIG. 3 is a schematic diagram of steps 7 to 8 in an embodiment of the present invention;
FIG. 4 is a schematic diagram of step 9 in an embodiment of the present invention;
FIG. 5 is a schematic diagram of step 10 in an embodiment of the present invention;
FIG. 6 is a schematic diagram of step 11 in an embodiment of the present invention;
FIG. 7 is a schematic diagram of step 12 in an embodiment of the present invention;
fig. 8 is a schematic diagram of step 13 in an embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
A reflecting surface antenna panel blocking method takes triangular panel blocking of a 15-meter reflecting surface antenna as an example, and makes the edge shape of the expanded reflecting surface be hexagonal on the projection surface of the expanded reflecting surface by expanding the offset reflecting surface or the circularly symmetric reflecting surface; dividing the hexagon on the projection surface into uniform triangles; projecting the triangles onto a reflecting surface; and finally, determining a gap between the panels, and partitioning the curved surface of the reflecting surface to obtain the reflecting surface antenna consisting of the triangular panels, wherein the partitioning principle is shown in the figures 1-8.
The method specifically comprises the following steps:
(1) three points on the aperture of the reflecting surface which are not on the same straight line are arbitrarily taken and are marked as P1, P2 and P3.
The antenna in this example is a 15 meter offset reflector antenna with a major axis length of 18m and a minor axis length of 15m, as shown in fig. 1.
(2) And (3) forming a plane P according to the three points obtained in the step (1), and intersecting the offset reflecting surface and the plane P to form a curve, which is marked as C and is shown in FIG. 1.
(3) Making an externally tangent hexagon H on the plane P according to the curve C obtained in the step (2); the six corner points are respectively marked as H1, H2, H3, H4, H5 and H6, as shown in fig. 1.
(4) The caliber of the offset reflecting surface is expanded along the tangential direction to obtain a curved surface S, as shown in FIG. 2.
(5) And (4) connecting the six points obtained in the step (3) to form six line segments, wherein the six line segments are marked as L1, L2, L3, L4, L5 and L6, and are shown in FIG. 2.
(6) And (3) intersecting the normal projection of the six line segments obtained in the step (5) along the plane P with the curved surface S to obtain six curves, which are respectively marked as L1 ', L2', L3 ', L4', L5 'and L6', and as shown in FIG. 3, the endpoints of the six curves are the points H1 ', H2', H3 ', H4', H5 'and H6' in FIG. 2.
(7) And (5) taking the six curves obtained in the step (6) as boundaries, and trimming the curved surface S to obtain a curved surface S', as shown in fig. 3.
(8) According to the hexagon H obtained in the step (3), line segments t1, t2, t3 … and t17 are made inside the hexagon H, as shown in FIG. 4.
The area of each triangular unit is 3.6m2The ratio of the maximum value to the minimum value of the triangular unit area is 1.
(9) And (3) projecting the line segment obtained in the step (8) along the normal direction of the plane P to intersect with the curved surface S ', so as to form curves t1 ', t2 ', t3 ', … … t17 ', as shown in FIG. 5.
(10) And (5) dividing the curved surface S' into triangular curved surfaces T1, T2 and T3 … … T66 according to the curve obtained in the step (9), as shown in FIG. 6.
(11) Within each triangular curved surface Ti (i is more than or equal to 1 and less than or equal to 66), three side lines of the curved surface Ti are respectively deviated along the tangential direction of the curved surface Ti, and the three side lines are respectively marked as Ti 1、Ti 2、Ti 3The edge line after moving is Ti 1’、Ti 2’、Ti 3', as shown in FIG. 7.
The tangential offset distance is denoted as delta in this example and takes the value of 1.5 mm.
(12) T obtained according to step (11)i 1’、Ti 2’、Ti 3' the curved surface Ti is trimmed to obtain triangular curved surfaces T1 ', T2 ', T3 ' … … T66 ', respectively, as shown in fig. 8.
At this point, the antenna panel is blocked.
The whole antenna panel of the reflector antenna manufactured by the method is in the shape of a curved surface S', and each triangular block in the panel adopts a three-point supporting mode. The antenna has the advantages of uniform panel area, high antenna installation precision, high antenna surface precision, easy and convenient panel partitioning and the like, and is an important improvement on the prior art.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (5)
1. A method for partitioning a reflector antenna panel is used for performing triangular partitioning on an offset reflector or a circularly symmetric reflector, and comprises the following steps:
(1) selecting three points on the edge of the antenna reflecting surface, which are not on the same straight line, and determining a plane passing through the three points, wherein the intersection line of the antenna reflecting surface and the plane is a closed curve;
(2) making a circumscribed hexagon of the closed curve on the plane;
(3) extending the reflecting surface at the edge along the tangential direction to obtain an extended curved surface of the reflecting surface;
(4) projecting the circumscribed hexagon to the extension curved surface along the normal direction of the plane to obtain a intercepted curved surface including an antenna reflecting surface, which is intercepted on the extension curved surface by six curve segments connected end to end;
(5) dividing the circumscribed hexagon, wherein the divided circumscribed hexagon is formed by splicing a plurality of triangular subregions;
(6) projecting each triangular subarea to the intercepting curved surface along the normal direction of the plane to obtain the division of the intercepting curved surface;
(7) for each divided sub-region of the intercepted curved surface, moving the boundary of the sub-region inwards to form a gap between two adjacent sub-regions, thereby completing secondary division of the intercepted curved surface;
(8) and partitioning the antenna panel according to the partitioning mode of secondary partitioning.
2. The reflector antenna panel blocking method according to claim 1, wherein the area of the triangular sub-region in the step (5) is 0.5 to 6m2。
3. The reflector antenna panel blocking method according to claim 1, wherein an area ratio of the largest triangular sub-area to the smallest triangular sub-area in the step (5) does not exceed 1.5.
4. The reflector antenna panel blocking method according to claim 1, wherein the distance by which the boundary is moved inward in the step (7) is 0.2 to 5 mm.
5. A reflector antenna comprising a panel, wherein the panel is a triangular block panel obtained by the reflector antenna panel block method according to any one of claims 1 to 4, and each triangular block of the panel is supported by a three-point support.
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| CN108110432B true CN108110432B (en) | 2020-03-10 |
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| CN108736169B (en) * | 2018-07-13 | 2024-02-20 | 中国科学院国家天文台 | FAST reflecting surface center Kong Suo stretch-draw flexible plugging structure |
| CN109582045B (en) * | 2019-01-08 | 2022-07-01 | 北京慧清科技有限公司 | Initial alignment method of antenna when carrier is inclined |
| CN110401040B (en) * | 2019-07-26 | 2020-05-26 | 中国电子科技集团公司第五十四研究所 | Reflecting surface antenna curved surface blocking method based on equalized area and mixed shape |
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